INDICATORS ON SEMI AUTOMATIC RIFLE YOU SHOULD KNOW

M1A1 carbine. Paratrooper model with folding buttstock and late challenge adjustable sight and bayonet lug.The "lug" around the barrel measures about .920 and about .twenty needs to be taken from the lug (.ten on either side) for the barrel to fit a receiver possessing a narrower channel (don't act on this information- I got it more than the cell p